Apr 23, 2013 12:39 PM by Stephen Bowers
The technical side:
Low pressure is developing over the Southern Rockies and moving toward the east. Low pressure often acts as a vacuum cleaner and draws in air from all around. That means the wind is blowing into the eastern quadrant of the low pressure circulation from the Southeast Colorado Plains, and an upslope wind flow is feeding into that circulation. As long as the upslope wind continues, the snow will continue. Once the low pressure exits the mountains, which will likely happen around early-to-mid afternoon today, the wind into the western side of the circulation will become a downslope wind. Downslope winds dry out the atmosphere, so that will choke off the snow and bring it to a quick end.
What this means for you:
Snow will continue until early-to-mid afternoon for most of the Southern Front Range and for portions of the Southeastern Plains. Earlier this morning on News 5 Today, we mentioned totals of an inch and a half for Colorado Springs and about half an inch for Pueblo. That was on top of what has already fallen, so final totals likely will still 1-4" for most areas along the I-25 corridor. Locally higher amounts are possible in spots, especially just west of I-25. Higher totals are still possible in Teller County as well as in the Wet Mountains, though the lower end of our 4-8" range looks to be most likely. Out in the Plains, it's mainly 1-3" with spotty cases of slightly higher amounts.
Along with the snow comes some cold. The cold will last through tomorrow morning. While you likely will need the coat on your way out the door Wednesday morning, we will warm into the 50's in the afternoon. Even warmer 60's and 70's are on the way for the end of the week and the weekend.
Icy roads have contributed to more than a dozen crashes today, especially around Colorado Springs. Remember to use caution and drive slower than you normally would, even if you are driving a four-wheel-drive vehicle, so you reach your destination safely. Remember to use low beam headlights, not necessarily so you can see but so you can be seen in conditions that favor poor visibility.